Production of rings and the like



of more an tWo SegmentS to produce tho completed article. of it moy be p ed, aS in ig. 4, to unite the tvo end ortions 8 of a one iece Split ring, `or thiS ofPoSe an inSert 2 of fouod Wire wiH be laced botWeen the rtS 8 and the latter reSSed to gether under the op lication of a curfenf aS deSCribed in connection vith ig. 1. x- Sfead of I1Sing a foond vife, inSefts of othef Shape Inay be used slloh aS the fectangulaI' inSert 9 ShoWn in ig. 5,

f1th0ughthe inSertS il111St1,ated are Sep arate )ioceS of II1eto1, I uSe the teI'I1 to in clude equany )ieceS vvhioh Inay be integfa1 Tvifh the atS to be united, theSe ieceS be ing of leSS vvi(ith than the edges; and the I)TesSure, ourfent and othef conditionS being so fegnlated aS to keeI) the latefol f 1()v of n1etal vvithin one of both of the suTfaceS of the finiShed article.

The pfooeSS, of CoUTSe, iS directed to Seg Inents of coInParatively thick IIletal, vhoSe edges have a SobStantial Tvidth. The Seg nlenfS I1oy be fornfed of Soffioiently heavy Sheet metol bent to the initia1 Sho e fe quired, of Inay be forIned in vafiouS otheI' Wy Though I have deSofibea vith great paftioularity of detail certain embodimentS of n1y invention, yet it vil1 be undefStood thaf the invention iS not reSt1 ioted to the articnlaI'oInbodinlentS diSoloSed. fiouS Inodi HoationS Inay be II1ade Tvithoot de arting ffon the invention as defined in the foHow-- ing claiIns.

xvhat claim iS= 1. The mefhod of uniting the edgeS of Inetal Poffs-Tvhich oonSiStS in locating n in- Sert betTveen S11ch edgeS, PaSSing veIding currenf aCroSS SoCh edgeS and thfongh the entire idth of Soh* inSeft and PreSSing the the iI1SeI'b overlying leSS than the fl111 vidf11 of the edges and the InoveInent of the artS tovard each othef bein So liInited aS to avoid the fofIning of o off roiecting be ,oI1d a faCe of the Xvelded article- 2. The mefhod of nnifing f11e edgos of nefal artS vhich conSistS in locating an in Seft bef7een Such edgos, poSing a TveIding curfent oroSS Suoh edges and through the enfire vidth of Snoh inSerf and reSSing the edges toward each other to ro uce Weld, the inSeft being of leSS Tvidth than the edgos and looated of o diStanCe fron1 both faoes and the movement of the artS toward each ohe' being So liTnited aS to avoid the forn1- ing of a bufr projecting beyond either foce of fhe ve1ded artiCle,

3. The Inethod of oniting the edges of Seg InentS to forTn a tobolar artiole Tvflioh con SiSfS in placing aI1 inSert betveen Suoh edgeS,

paSSing o Tvelding oIIrreIlt aofoSS SIloh edgeS and throogh the entife vidth of Suoh inSert and presSlng the edgeS tOTvard each othef to Prodnce a Weld, fhe inSerf overlying loSS thon the full Tvidth of the edgeS and the II1oven1ent of the artS tovord each other being So lin1iteCl aS to ovoid the forIning of a burr roiecting beyond foce of the velded oftiCle 4. The method of Uniting fhe edges of SegInents to. fofn1 3 fobul8r oftiole hiCh oonSiStS in laoing an inSert betv7een S11ch edgeS, aSSing a Welding current ooToss Snoh edgeS and through the entire Tvidth of Sooh inSeft and pfeSSing the edgeS tovord each othe1 to roduce a Weld, the inSeft being of leSS Widt1 t11an the edgeS ond located of al diStance from both foces ond the movement of the palfS toWard eaoh other being So liInite(1 oS to avoid the forn1ing of o buff roiecting beyond eithef face of the Welded artiole.

5. The method of nniting the edgeS of n1etal partS vhich ConSiStS in 10cating on inSeft betveen SUch edgeS, I)ESSing ocroSS Such edgoS and thfough the enfire vidth of such iI1Seft o Tvelding ourrent of eXtfeInely high am ere Strength per unit of areo of the oontoCt Surface and of very brief dufo tion and PreSSing the edgeS tov8rd eaoh otheI' to prodnce a Tveld, the inSert oveflying leSS than the full Tvidth of fhe edgeS and the Inovenlent of the PartS tovvard eooh other being So liInited aS to avoid the fof111ingof o burr pfoiecting beyond a foce of tho Welded article.

6. The Inethod of makin a 1'in fo1' electrio1 opParatuS of tho like vvhio1 oonSiStS in forI1ing segInentS of Snoh o fin and uniting the edgeS of Said SegInentS byocot ing an inSert betWeen Such edgeS, poSsing a e1ding onrrent acroSS Sllch edgeS and throogh the entife vidth of Suoh inSe1't ond feSSing the edgeS toTvard each otheI' to pfo duce a veld. the inSert overlying less tha11 nent of the SegnenfS toTvard eaoh other being so lin1ited aS to void the fornling of a borf pfoieofing be} onCl face of the velded nng.

7. n afticle of n1nufaCtofe inoluding tfvo oonlparatively thick IT1etol poffs looated edge to edge with intermedite metal betveen then1 covering leSS than thefllll thick 11eSs of Said ortS Soid offS being ve1ded together thfongh Said intonnedite metaL 8. 4 tubolar afticle of Inanufactore including Segn1ental Pafts of coInPoratively thiok Inetal, their longitudinol edgeS being united Tvifh interolediafe Inetal betveen theIn oovoring leSS thn the fulI thickneSS of the Seg mental parts, Soid SegInent81 PrtS being ve1ded together throngh Said inteflT1ediate metaL 9. ring foI' electrioal opparatnS oI the lil e conPoSed of Segn1entaI I)o.ftS of on1 8r8tively thick Inetal having their 1orgitu d1nal edgoS 1111ited Tvith interIIlediate nletal 

